Basilisk 52.9.2026.09.24

What's new in 52.9.2026.09.24

UXP Changes:
- Implemented the URL.Parse() convenience function.
- Added multiple bounds checks on internal browser functions to avoid potential out-of-bounds accesses, underflows and overflows. (DiD)
- Fixed several issues with loading and parsing content-supplied fonts.
- Set a bottom limit on the frequency for audio samples to avoid a whole class of potential bugs surrounding audio loading, processing and playback.
Audio formats with a sample rate below 8kHz (the commonly accepted lowest sample rate of "telephone"/"walkie-talkie" quality) are now rejected.
- Fixed a potential issue in CSS rounded corners with dotted styling.
- Image elements in forms are no longer associated if they are not in the same subtree.
- Made image animation checks more strict to avoid potential issues if decoding would be slow.
- Video region checks are now more strict to avoid issues with malformed video files.
- Implemented the CSS revert-layer keyword.
- Implemented CSSStyleSheet replaceSync.
- Implemented the CSS :has() pseudo class.
- Implemented support for adoptedStyleSheets.
- Firefox compatibility mode had its version updated to 140 by default. Of course this can still easily be overridden (globally or per-site) where necessary.
- JavaScript garbage collection and DOM cycle collection have been given a number of important fixes to better deal with heavy modern websites that would not properly release their resources. The "ghostbuster" workaround for lingering window objects has been removed in tandem as it is no longer necessary.
- Removed old and obsolete code from the platform related to ancient or completely unsupported compile targets.
- The uppercase version of ß (eszett/scharfes S) will now always mirror the lowercase writing method. See implementation notes.
- Added more updates for LoongArch64 (including full JIT) and Mac/PPC support.
- Linux/FreeBSD: Added a GTK2 dependency toggle to build NPAPI support without GTK2. This allows Basilisk to build plugin support on systems with no GTK2 packages.
- Removed the unused "network tickler" module, an inherited component that could ping wireless networks on a regular interval.
- Modernized std::*<T>::value/::type to their _v and _t suffix forms, respectively, aligning with more modern C++ language standards and compiler behavior.
- Updated CSS aspect-ratio to be more spec-compliant.
- Updated flex container buttons to report a definite size (avoiding 0-sized elements on some websites). …

Full release notes »